Signature of carrier-induced ferromagnetism in Ti1-xCoxO2-δ: Exchange interaction between high-spin Co2+ and the Ti 3d conduction band

J. W. Quilty; A. Shibata; J. Y. Son; K. Takubo; T. Mizokawa; H. Toyosaki; T. Fukumura; M. Kawasaki

doi:10.1103/PhysRevLett.96.027202

Signature of carrier-induced ferromagnetism in Ti1-xCoxO2-δ: Exchange interaction between high-spin Co2+ and the Ti 3d conduction band

J. W. Quilty^*, A. Shibata, J. Y. Son, K. Takubo, T. Mizokawa, H. Toyosaki, T. Fukumura, M. Kawasaki

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

97 Citations (Scopus)

Abstract

X-ray photoemission spectroscopy measurements were performed on thin-film samples of rutile Ti1-xCoxO2-δ to reveal the electronic structure. The Co 2p core-level spectra indicate that the Co ions take the high-spin Co2+ configuration, consistent with substitution on the Ti site. The high-spin state and the shift due to the exchange splitting of the conduction band suggest strong hybridization between carriers in the Ti 3d t2g band and the t2g states of the high-spin Co+2. These observations support the argument that room temperature ferromagnetism in Ti1-xCoxO2-δ is intrinsic.

Original language	English
Article number	027202
Journal	Physical Review Letters
Volume	96
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.96.027202
Publication status	Published - 2006 Jan 20
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.96.027202

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title = "Signature of carrier-induced ferromagnetism in Ti1-xCoxO2-δ: Exchange interaction between high-spin Co2+ and the Ti 3d conduction band",

abstract = "X-ray photoemission spectroscopy measurements were performed on thin-film samples of rutile Ti1-xCoxO2-δ to reveal the electronic structure. The Co 2p core-level spectra indicate that the Co ions take the high-spin Co2+ configuration, consistent with substitution on the Ti site. The high-spin state and the shift due to the exchange splitting of the conduction band suggest strong hybridization between carriers in the Ti 3d t2g band and the t2g states of the high-spin Co+2. These observations support the argument that room temperature ferromagnetism in Ti1-xCoxO2-δ is intrinsic.",

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T1 - Signature of carrier-induced ferromagnetism in Ti1-xCoxO2-δ

T2 - Exchange interaction between high-spin Co2+ and the Ti 3d conduction band

AU - Quilty, J. W.

AU - Shibata, A.

AU - Son, J. Y.

AU - Takubo, K.

AU - Mizokawa, T.

AU - Toyosaki, H.

AU - Fukumura, T.

AU - Kawasaki, M.

PY - 2006/1/20

Y1 - 2006/1/20

N2 - X-ray photoemission spectroscopy measurements were performed on thin-film samples of rutile Ti1-xCoxO2-δ to reveal the electronic structure. The Co 2p core-level spectra indicate that the Co ions take the high-spin Co2+ configuration, consistent with substitution on the Ti site. The high-spin state and the shift due to the exchange splitting of the conduction band suggest strong hybridization between carriers in the Ti 3d t2g band and the t2g states of the high-spin Co+2. These observations support the argument that room temperature ferromagnetism in Ti1-xCoxO2-δ is intrinsic.

AB - X-ray photoemission spectroscopy measurements were performed on thin-film samples of rutile Ti1-xCoxO2-δ to reveal the electronic structure. The Co 2p core-level spectra indicate that the Co ions take the high-spin Co2+ configuration, consistent with substitution on the Ti site. The high-spin state and the shift due to the exchange splitting of the conduction band suggest strong hybridization between carriers in the Ti 3d t2g band and the t2g states of the high-spin Co+2. These observations support the argument that room temperature ferromagnetism in Ti1-xCoxO2-δ is intrinsic.

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Signature of carrier-induced ferromagnetism in Ti1-xCoxO2-δ: Exchange interaction between high-spin Co2+ and the Ti 3d conduction band

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